Vibrating machine



Jan. 2s,1937. E; P, LARSH 2,068,992

V'IIBRATING MACHINE Filed Aug. 18, 1928 3 Sheets-Sheet l Jan. 26, 1937. E. P. LARSH VIBRATING MACHINE Filed Aug. 18, 1928 3 Sheets-Sheet 2 atto'z new Jan. 26, 1937. E. P. LARSH VIBRATING MACHINE Filed Aug. 18, 1928 3 Sheets-Sheet 3 Patented Jan. 26, 1937 VIBRATING MACHINE Everett P. Larsh, Dayton, Ohio, assignor to The Master Electric Company, Dayton, Ohio, a corporation of Ohio Application August 18, 1928, Serial No. 300,498

tically, that is to say, with its armature shaft 4 extending in vertical relation. Mounted upon the frame or housing of the motor 3 for oscillatory movement about a vertically disposed pivotal stud 5 is the vibratory yoke B, the extremities of ,5 which are bent into hook shaped arms I for engagement of the ends of an applicator belt or band 8. Different methods are employed for oscillating the yoke.- A simplified construction wherein the yoke is directly connected with the 1,0 motor shaft for unison operation is shown in Figs. 2, 3 and 4. Referring to such figures, there is mounted upon the extremity of the armature shaft 4 of the motor 3 an eccentric 9 with which engages a connecting rod It, the opposite end of the latter being pivotally connected at H to the oscillatory yoke. The connection II is at a point eccentric with the pivotal mounting 5 of the yoke, and hence as the motor shaft 4 and eccentric 9 rotate, they transmit through the connecting rod II] to the yoke 6, oscillatory motion. A counterbalance weight 12 is carried by the motor shaft l. The operative parts of the apparatus are enclosed within a housing l3 6 Claims.

My invention relates to a kinesipathic apparatus, and more particularly, to a motor actuated oscillatory vibrator adapted to transmit to a belt or strap applicator a to and fro reciprocatory motion.

The object of the invention is to simplify the structure as well as the means .and mode of operation of such apparatus, whereby it will not only be cheapened in construction, but will be more efiicacious and possess the desired therapeutic action, will be positive in operation, uniform in action, and unlikely to get out of repair.

A further object of the invention is to provide an apparatus of this character which will be compact in form, having but few operating parts and which may be pleasing in its appearance.

A further object of the invention is to provide a structure which will withstand strong pulling or straining effect Without upsetting, and without the necessity of anchor devices.

With the above primary and other incidental objects in view, as will more fully appear in the specifications, the invention consists of the features of construction, the parts and combinations thereof, and the mode of operation, or their equivalents, as hereinafter described and set forth in the claims.

Referring to the accompanying drawings, wherein is shown the preferred, but obviously not necessarily the only form of embodiment of the invention, Fig. 1 is a side elevation of the assembled kinesipathic apparatus illustrating the manner of attaching the applicator and its application to the patient receiving the treatment. Fig. 2 is a top plan View of the driving motor with the yoke housing removed. Fig. 3 is a vertical sectional View. Fig. 4 is a detail sectional view. Figs. 5, 6 and 7 illustrate a modification. Fig. 8 is a plan View.

Like parts are indicated by similar characters of reference throughout the several views.

In the drawings, l indicates an inclined base or platform upon which the patient may stand while receiving treatment. Embedded in a suitable depression in the top surface of the base I is a pad of resilient material as illustrated in Fig. 8. Projecting vertically from the higher end of the base I is a pedestal 2, preferably, though not necessarily, formed in telescopically adjustable sections which may be adjusted by-screws 2a. Such adjustment enables the apparatus to be raised or lowered to accommodate patients of different height or the particular part of the body to be treated. Mounted on top of the pedestal 2 is an electric motor 3 disposed Ver which the hookarms l of the yoke extend at opposite sides of the motor. The operation of the motor transmits to the oscillatory yoke a rapid vibratory motion, whichin turn, is transmitted to the applicator belt or band 8, the opposite ends of which are connected to the hook arm 1 at opposite sides of the motor. The applicator is thus given a rapid toand fro vibratory motion. By this form of actuating connection, the yoke is caused to vibrate at a rate equal to the rotation of the armature shaft. Thus the speed of vibration or oscillation of the yoke is varied by varying the motor speed.

In the preferred and commercial form of apparatus as illustrated in Figs. 5, 6 and 7, the 40 yoke is connected with the driveshaft through an intermediate speed reduction gear train and the pitman I9 is adjustably connected with the yoke 6 to vary its stroke. Referring to the drawings Figs. 5, 6 and 7, the armature shaft 4 45 is provided with a gear pinion l5 meshing with a gear l6 revolubly mounted upon a trunnion stud .ll projecting from the top .of the motor housing. In such construction the eccentric 9 is fixedly connected with the gear I'B for unison 5 rotation. The connecting rod or pitman l0 engages with the eccentric 9 and at its opposite end is adjustably connected with the yoke 6. The yoke li is longitudinallyv slotted at l8in which slot is mounted an adjustable bearing block I9, 55

bolted to the top of the motor frame, beyond from which extend in opposite directions trunnion studs 20. The bearing block may be adjusted to and fro within the slot l8 by means of a screw shaft 2| journalled in bearings on the yoke 6, and having screw threaded engagement with the adjustable bearing block IS. The screw shaft 2| is operated by the hand wheel 22 to move the block l9 and its trunnion studs 20 toward and from the fulcrum or center of oscillation of the yoke 6. The pitman I0 is bifurcated at its extremity and is engaged with the trunnion studs 20 of the adjust-able bearing block l9. To facilitate the interconnection of these parts, one arm of the bifurcated pitman I0 is provided with an enlarged opening through which the block l9 may be inserted, and in which is mounted a bushing ring 23, forming the bearing and having engagement with the trunnion stud 20. By means of the intermeshing gears l5 and I6, the speed of the operation is materially reduced. By varying the adjustment of the pitman connection with the yoke 6 by means of the screw stem 2!, the stroke of the yoke 6 may be increased or diminished. While a simple gear connection has been illustrated, for commercial manufacture a variable speed transmission, preferably, though not necessarily, of the sliding gear type is employed. Such variable gear transmission mechanism being well known and forming no part per se of the present invention, has not been illustrated in detail. To provide for lubrication, a stud I1 is provided with an oil passage 24, while the housing I3 is provided with an oil cup or nipple 25 registering with the duct of said stud. The patient standing upon the inclined base I and encircled by the band or belt 8, by leaning backwardly more or less strongly against the belt or band, is subjected to the vibratory action of the belt. Instead of connecting opposite ends of the belt or band 8 to the respective hook arms 7, one end of the band may be so connected and the band may be wrapped about the affected part and the loose end of the band held in the hand.

It is not essential that the patient shall stand upon the base or platform I, but if the applicator band is sufficiently long they may stand beyond such base. However, the extension of the base I a considerable distance toward the position of the patient permits the apparatus to withstand considerable pull upon the applicator band without being upset. By standing upon the base, greater security from upsetting may be had. The base I is preferably though not necessarily formed in two sections hinged one to the other at 26. This enables the extended base to be folded into small space, as indicated by dotted lines in Fig. 1, for storage. When extended the base section is locked in such position by a latch 21.

An electric switch l4 controls the motor.

From the above description it will be apparent that there is thus provided a device of the character described, possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its form, proportions and detail construction and arrangement of parts without departing from the principle involved or sacrificing any of its advantages.

While in order to comply with the statute, the invention has been described in language more or less specific as to structural features, it is to be understood that the invention is not limited to the specific details shown, but that the means and construction herein disclosed comprises the preferred form of several modes of putting the invention into effect, and the invention is, therefore, claimed in any of its forms or modifications within the legitimate and valid scope of the appended claims.

Having thus described my invention, I claim:

1. An apparatus for kinesitherapy treatment including, a pedestal, an electric motor mounted on top of the pedestal with its armature shaft vertically disposed, a vibratory yoke mounted upon the motor housing for oscillatory movement about a vertical axis, the arms of said yoke extending laterally beyond the motor housing for connection With an applicator and an operative connection between the armature shaft and yoke.

2. An apparatus for kinesitherapy treatment, including an upright pedestal, an electric motor mounted on top of the pedestal with its armature shaft vertically disposed, an eccentric operatively connected with the shaft, an oscillatory yoke to which an applicator may be connected mounted on the motor frame for to and fro movement about a vertical axis and a connecting rod connecting the yoke and eccentric to transmit oscillatory movement to said yoke.

3. In a kinesitherapic apparatus, a motor actuated oscillatory vibrating yoke, a pedestal upon which said yoke is mounted, and an inclined base for said pedestal with one end of which the pedestal is rigidly connected upon which the patient exerts resistance pressure against the pulling action of the vibrating yoke whereby the strains are confined to the apparatus with no tendency to displace or upset the same.

4. In a kinesitherapic apparatus, an electric motor arranged with its armature shaft vertically disposed, an oscillatory yoke pivoted upon the motorframe for to and fro motion about a vertical axis, a connecting rod, an eccentric connection therefor, operatively connected with the motor armature shaft and adjusting means for varying the oscillator stroke of the yoke, and an applicator engageable with either end of said yoke.

5. In a kinesitherapic apparatus, an electric motor arranged with its armature shaft vertically disposed, an oscillatory yoke mounted upon the motor frame for to and fro movement about a vertical axis, the ends of the yoke being adapted for engagement of an applicator, an actuating connection between the yoke and armature shaft including a pitman, and a variable connection between the pitman and the yoke adjustable toward and from the center of oscillation of the yoke, to vary its stroke, and an adjusting screw carried by the yoke, for maintaining said parts in their positions of relative adjustment.

6. In a kinesitherapic apparatus, an electric motor arranged with its armature shaft vertically disposed, an oscillatory yoke mounted upon the motor frame for to and fro movement about a vertical axis, the ends of the yoke being adapted for engagement of an applicator, an actuating connection between the yoke and armature shaft including a pitman, said yoke having therein a longitudinal slot, a bearing block having sliding engagement within the slot, pivotal connections between the block and the pitman, and means for securing the block in different positions of adjustment within the limits of the slot.

EVERETT P. LARSH. 

